Gene flow
Gene flow
Gene flow (pronounced: /dʒiːn floʊ/), also known as gene migration, is a fundamental concept in the field of population genetics. It refers to the transfer of genetic variation from one population to another. If the rate of gene flow is high enough, then two populations are considered to have equivalent genetic diversity.
Etymology
The term "gene flow" was first used in the early 20th century. It is derived from the English words "gene", referring to the basic physical and functional unit of heredity, and "flow", indicating movement or transfer.
Mechanisms
Gene flow can occur in various ways, including migration, seed dispersal, and animal dispersal. It can also occur as a result of human activities, such as the movement of crop plants.
Effects
Gene flow can have significant effects on populations. It can increase genetic diversity, which can help populations adapt to new environments. However, it can also lead to the spread of harmful genes, and can potentially lead to the extinction of local populations.
Related terms
- Genetic drift: This is a mechanism of evolution that causes random changes in the frequency of alleles in a population.
- Natural selection: This is the process by which certain traits become more or less common in a population due to their effects on the survival and reproduction of their bearers.
- Mutation: This is a change in the DNA sequence of a gene.
External links
- Medical encyclopedia article on Gene flow
- Wikipedia's article - Gene flow
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